DFONT to OTB conversion is the process of transforming a Mac OS X Datafork TrueType font container (DFONT) into an OTB (OpenType Binary) font package so the font can be used on systems and applications that prefer or require OpenType binaries. This conversion extracts glyph outlines, tables, and metadata from the DFONT container and repackages them into the OTB format while attempting to retain metrics, kerning, and hinting.
Related guides
Practical guides to help you choose formats, preserve quality, and avoid common conversion problems.
WebP has quietly become the default image format of the modern web, delivering 25-35% smaller files than JPG and PNG with universal browser support. This 2026 guide covers current adoption stats, browser compatibility, WordPress integration, conversion workflows, and when to choose WebP over AVIF for optimal Core Web Vitals performance.
Read guide →Not sure whether to save your image as PNG or JPG? This detailed comparison covers compression, transparency, file size, web performance, and real-world use cases so you can pick the right format every time — with conversion links when you need to switch.
Read guide →Learn how to convert HEIC to JPG for maximum compatibility. This guide explains what HEIC is, why iPhones use it, the key differences between HEIC and JPG, and walks through every conversion method including online tools, iPhone settings, Windows, and Mac.
Read guide →Drag your .DFONT file from your computer or use the browse function.
Confirm .otb as the selected destination format.
Click "Convert" and download your converted .OTB file once ready.
DFONT files typically have the MIME type 'application/x-font-dfont' and are used primarily in macOS environments for bitmap and vector fonts. OTB files follow the OpenType specification and usually carry the MIME type 'font/otb', supporting advanced typographic features and bitmap glyphs. Conversion between these formats involves transcoding font data to maintain glyph accuracy and kerning information.
The OTB (.OTB) format is commonly used for image. Understanding its characteristics can be helpful when converting to or from other formats like DFONT.
While specific technical details aren't available here, OTB files generally serve the purpose of storing image effectively within their domain.
Our Online DFONT to OTB Converter allows you to quickly and accurately convert your DFONT files to the widely supported OTB format. Designed for designers, developers, and font enthusiasts, this tool simplifies font format conversion without the need for complex software installations.
DFONT is a Mac-specific font format primarily used in older Apple systems, while OTB (OpenType Bitmap) is a more versatile font format supported across multiple platforms. OTB fonts often provide better compatibility with modern software and improved rendering options compared to DFONT files. Choosing OTB ensures broader usability and easier integration in design workflows.
Keep individual DFONT files under 50–100MB for fastest, most reliable conversions; larger font collections can be split before converting.
To preserve visual fidelity, choose a conversion option that preserves TrueType hinting and kerning tables; avoid "optimize size" if hinting is critical.
For bulk workflows, convert in batches of 10–50 fonts depending on system memory; use command-line or scripted converters to automate and verify results.
Note format-specific limits: DFONT is a macOS container and may include platform-specific name tables that need remapping for OTB; some legacy hinting or mac-specific features may not transfer perfectly.
This converter saved me hours converting legacy fonts.
Emily R.
Graphic Designer
Seamless and fast conversion, highly recommended.
Mark L.
Web Developer
Finally, a reliable way to convert DFONT to OTB online.
Sophia M.
Typographer
Start your free DFONT to OTB conversion now.
Drag your file here to to upload.
Up to 250MB
Always validate the resulting OTB in a font inspector (e.g., FontForge, OTMaster) and test in target apps to ensure metrics and OpenType features behave as expected.